US3851632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling noxious components of exhaust gas from diesel engine
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1973-09-11
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Granted: 1974-12-03
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Expires: 1993-09-11
Abstract
Abstract A sensor is inserted in the exhaust pipe of a normally aspirated type diesel engine. When the oxygen concentration in the exhaust gas from the engine falls below a preset level, the sensor detects the insufficiency of oxygen concentration and causes oxygen to be supplied into the cylinder so as to make up for the shortage of oxygen. By thus maintaining the oxygen concentration in the exhaust gas above the said preset level, noxious components of the exhaust gas are controlled.
Inventors
- 👤 N Teshirogi
- 👤 H Nakahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:44
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1439; F02B; F02B47/00; F02B47/04; F02B47/06; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A method for the control of noxious components of the exhaust gas from a normally aspirated type diesel engine adapted to permit recirculation of the exhaust gas, improvement comprising having the exhaust gas constantly checked for oxygen concentration and, each time the oxygen concentration falls below a preset level, allowing additional oxygen to be supplied to said engine.
Claim 2
Independent Claim
58 words
A method for the control of noxious components of the exhaust gas from a normally aspirated type diesel engine adapted to permit recirculation of the exhaust gas, improvement comprising having the exhaust gas constantly checked for oxygen concentration and, each time the oxygen concentration falls below a preset level, allowing additional oxygen to be supplied to said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |